<script>
    import { ref, h } from 'vue';

    export default {
        setup() {
            const counter = ref(0);

            return () => {
                return h("div", {class: "app"}, [
                h("h2", null, `当前计数: ${counter.value}`),
                h("button", {
                    onClick: () => counter.value++
                }, "+1"),
                h("button", {
                    onClick: () => counter.value--
                }, "-1"),
            ])
            }
        },

                
    }
</script>

<style scoped>

</style>